Can Helium-detonation Model Explain the Observed Diversity of Type Ia Supernovae?

Abstract

We study a sample of 16 Type Ia supernovae (SNe Ia) having both spectroscopic and photometric observations within 2 $-$ 3 days after the first light. The early $B-V$ colors of such a sample tends to show a continuous distribution. For objects with normal ejecta velocity (NV), the C~II $\lambda$6580 feature is always visible in the early spectra while it is absent or very weak in the high-velocity (HV) counterpart. Moreover, the velocities of the detached high-velocity features (HVFs) of Ca~II NIR triplet (CaIR3) above the photosphere are found to be much higher in HV objects than in NV objects, with typical values exceeding 30,000 km~s${}^{-1}$ at 2 $-$ 3 days. We further analyze the relation between %velocities of Si~II~$\lambda$6355 at maximum, $v_{\mathrm{Si},\max }$, the velocity shift of late-time [Fe~II] lines ($v_{[\mathrm{Fe}\mathrm{II}]}$) and host galaxy mass. We find that all HV objects have redshifted $v_{[\mathrm{Fe}\mathrm{II}]}$ while NV objects have both blue- and redshifted $v_{[\mathrm{Fe}\mathrm{II}]}$. It is interesting to point out that the objects with redshifted $v_{[\mathrm{Fe}\mathrm{II}]}$ are all located in massive galaxies, implying that HV and a portion of NV objects may have similar progenitor metallicities and explosion mechanisms. We propose that, with a geometric/projected effect, the He-detonation model may account for the similarity in birthplace environment and the differences seen in some SNe Ia, including $B-V$ colors, C~II feature, CaIR3 HVFs at early time and $v_{[\mathrm{Fe}\mathrm{II}]}$ in the nebular phase. Nevertheless, some features predicted by He-detonation simulation, such as the rapidly decreasing light curve, deviate from the observations, and some NV objects with blueshifted nebular $v_{[\mathrm{Fe}\mathrm{II}]}$ may involve other explosion mechanisms.

arXiv commentaccepted by the ApJ

References in corpus (91)

• The NumPy array: a structure for efficient numerical computation
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• Three-dimensional delayed-detonation models with nucleosynthesis for Type Ia supernovae
• Supernova 2011fe from an Exploding Carbon-Oxygen White Dwarf Star
• Normal Type Ia supernovae from violent mergers of white dwarf binaries
• Double-detonation sub-Chandrasekhar supernovae: can minimum helium shell masses detonate the core?
• Seeing the Collision of a Supernova with its Companion Star
• Sub-Chandrasekhar Mass Models For Type Ia Supernovae
• The Carnegie Supernova Project: Light Curve Fitting with SNooPy
• Double-detonation sub-Chandrasekhar supernovae: synthetic observables for minimum helium shell mass models
• Improved Distances to Type Ia Supernovae with Two Spectroscopic Subclasses
• Three-Dimensional Delayed-Detonation Model of Type Ia Supernova
• Sub-Chandrasekhar-mass white dwarf detonations revisited
• An asymmetric explosion as the origin of spectral evolution diversity in type Ia supernovae
• The Carnegie Supernova Project: Intrinsic Colors of Type Ia Supernovae
• Constraining Type Ia supernova models: SN 2011fe as a test case
• Helium star donor channel for the progenitors of type Ia supernovae
• Time-dependent 3D spectrum synthesis for type Ia supernovae
• Supernova 2002bo: inadequacy of the single parameter description
• Type Ia Supernovae as Stellar Endpoints and Cosmological Tools
• What Can We Learn from the Rising Lightcurves of Radioactively-Powered Supernovae?
• Maximum Brightness and Post-Maximum Decline of Light Curves of SN~Ia: A Comparison of Theory and Observations
• Observational Predictions for Sub-Chandrasekhar Mass Explosions: Further Evidence for Multiple Progenitor Systems for Type Ia Supernovae
• Evidence for Two Distinct Populations of Type Ia Supernovae
• High-Velocity Features: a ubiquitous property of Type Ia SNe
• A luminous, blue progenitor system for a type-Iax supernova
• SN~2012cg: Evidence for Interaction Between a Normal Type Ia Supernova and a Non-Degenerate Binary Companion
• The Initiation and Propagation of Helium Detonations in White Dwarf Envelopes
• Very Early Ultraviolet and Optical Observations of the Type Ia Supernova 2009ig
• Early Blue Excess from the Type Ia Supernova 2017cbv and Implications for Its Progenitor
• Delayed detonations in full-star models of Type Ia supernova explosions
• Mass-accreting white dwarfs and type Ia supernovae
• A Study of Carbon Features in Type Ia Supernova Spectra
• Synthetic light curves and spectra for three-dimensional delayed-detonation models of Type Ia supernovae
• Lijiang 2.4-meter Telescope and its Instruments
• The Outermost Ejecta of Type Ia Supernovae
• The Very Young Type Ia Supernova 2013dy: Discovery, and Strong Carbon Absorption in Early-Time Spectra
• The expanding bipolar shell of the helium nova V445 Puppis
• Exploring the spectral diversity of low-redshift Type Ia supernovae using the Palomar Transient Factory
• Type Ia Supernovae from Merging White Dwarfs I. Prompt Detonations
• Double Detonations with Thin, Modestly Enriched Helium Layers Can Make Normal Type Ia Supernovae
• Type Ia Supernova Carbon Footprints
• Linking Type Ia Supernova Progenitors and their Resulting Explosions
• Strong near-infrared carbon in the Type Ia supernova iPTF13ebh
• Analysis of the Early-Time Optical Spectra of SN 2011fe in M101
• Using late-time optical and near-infrared spectra to constrain Type Ia supernova explosion properties
• Spectroscopic Observations of SN 2012fr: A Luminous Normal Type Ia Supernova with Early High Velocity Features and Late Velocity Plateau
• The Earliest Near-infrared Time-series Spectroscopy of a Type Ia Supernova
• The Very Young Type Ia Supernova 2012cg: Discovery and Early-Time Follow-Up Observations
• The Photometric System of Tsinghua-NAOC 80-cm Telescope at NAOC Xinglong Observatory
• ZTF Early Observations of Type Ia Supernovae II: First Light, the Initial Rise, and Time to Reach Maximum Brightness
• He-accreting carbon-oxygen white dwarfs and type Ia supernovae
• Think Global, Act Local: The Influence of Environment Age and Host Mass on Type Ia Supernova Light Curves
• Type Ia supernovae from violent mergers of carbon-oxygen white dwarfs: polarisation signatures
• Polarisation spectral synthesis for Type Ia supernova explosion models
• Helium Nova on a Very Massive White Dwarf -- A Light Curve Model of V445 Puppis (2000) Revised
• SN 2012fr: Ultraviolet, Optical, and Near-Infrared Light Curves of a Type Ia Supernova Observed Within a Day of Explosion
• Optical and Ultraviolet Observations of the Narrow-Lined Type Ia SN 2012fr in NGC 1365
• Evidence for Type Ia Supernova Diversity from Ultraviolet Observations with the Hubble Space Telescope
• Early Observations of the Type Ia Supernova iPTF 16abc: A Case of Interaction with Nearby, Unbound Material and/or Strong Ejecta Mixing
• Surface Radioactivity or Interactions? Multiple Origins of Early-excess Type Ia Supernovae and Associated Subclasses
• Red vs Blue: Early observations of thermonuclear supernovae reveal two distinct populations?
• Sub-Chandrasekhar progenitors favoured for type Ia supernovae: Evidence from late-time spectroscopy
• Nebular Spectroscopy of the `Blue Bump' Type Ia Supernova 2017cbv
• Type Ia Supernova Spectral Features in the Context of Their Host Galaxy Properties
• A one-dimensional Chandrasekhar-mass delayed-detonation model for the broad-lined Type Ia supernova 2002bo
• Type Ia supernova diversity: white dwarf central density as a secondary parameter in three-dimensional delayed detonation models
• High-Velocity Line Forming Regions in the Type Ia Supernova 2009ig
• Predicting polarization signatures for double-detonation and delayed-detonation models of Type Ia supernovae
• The Young and Nearby Normal Type Ia Supernova 2018gv: UV-Optical Observations and the Earliest Spectropolarimetry
• The Silicon and Calcium High-Velocity Features in Type Ia Supernovae from Early to Maximum Phases
• Berkeley Supernova Ia Program: Data Release of 637 Spectra from 247 Type Ia Supernovae
• The Cold and Dusty Circumstellar Matter around Fast-expanding Type Ia Supernovae
• ZTF Early Observations of Type Ia Supernovae III: Early-Time Colors as a Test for Explosion Models and Multiple Populations
• A Three-Dimensional Picture of the Delayed-Detonation Model of Type Ia Supernovae
• High-Velocity Type Ia Supernova Has a Unique Host Environment
• Red and Reddened: Ultraviolet through Near-Infrared Observations of Type Ia Supernova 2017erp
• The first 48: Discovery and progenitor constraints on the Type Ia supernova 2013gy
• Type Ia SN 2019ein: New Insights into the Similarities and diversities among High-Velocity SNe Ia
• UV-Optical Observation of Type Ia Supernova SN 2013dy in NGC 7250
• Constraining the Source of the High-velocity Ejecta in Type Ia SN 2019ein
• The Night Sky Spectrum of Xinglong Observatory: Changes from 2004 to 2015
• An Empirical Fitting Method for Type Ia Supernova Light Curves. II. Estimating the First-Light Time and Rise Time
• Evidence for asymmetric distribution of circumstellar material around Type Ia Supernovae
• Merging of a CO WD and a He-rich white dwarf to produce a type Ia supernovae
• SN 2017cfd: A Normal Type Ia Supernova Discovered Very Young
• Distribution of Si II $\lambda$6355 Velocities of Type Ia Supernovae and Implications for Asymmetric Explosions
• Spectral sequences of Type Ia supernovae. II. Carbon as a diagnostic tool for explosion mechanisms
• Exploring the shell model of high-velocity features of Type Ia supernovae using TARDIS

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